flm01/mote/v2/openwrt/package/flukso/luasrc/fluksod.lua

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#! /usr/bin/env lua
--[[
fluksod.lua - Lua part of fluksod
Copyright (C) 2011 Bart Van Der Meerssche <bart.vandermeerssche@flukso.net>
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
]]--
require 'dbg'
require 'nixio'
require 'nixio.fs'
local spi = require 'flukso.spi'
DAEMON = os.getenv('DAEMON') or 'fluksod'
DAEMON_PATH = os.getenv('DAEMON_PATH') or '/var/run/' .. DAEMON
O_RDWR_NONBLOCK = nixio.open_flags('rdwr', 'nonblock')
POLLIN = nixio.poll_flags('in')
function mkfifos(input)
local path = string.format('%s/%s/', DAEMON_PATH, input)
nixio.fs.mkdirr(path)
nixio.fs.unlink(path .. 'in') --> clean up mess from previous run
nixio.fs.unlink(path .. 'out') --> idem
nixio.fs.mkfifo(path .. 'in', '644')
nixio.fs.mkfifo(path .. 'out', '644')
local fdin = nixio.open(path .. 'in', O_RDWR_NONBLOCK)
local fdout = nixio.open(path .. 'out', O_RDWR_NONBLOCK)
return { fd = fdin, --> need this entry for nixio.poll
fdin = fdin,
fdout = fdout,
events = POLLIN,
revents = 0,
line = fdin:linesource() }
end
local uart = mkfifos('uart')
local ctrl = mkfifos('ctrl')
local delta = mkfifos('delta')
local fds = { uart, ctrl, delta }
local spidev = nixio.open('/dev/spidev0.0', O_RDWR_NONBLOCK)
while true do
if nixio.poll(fds, -1) then
if delta.revents == POLLIN then
--> TODO flush the delta fd after each POLLIN
local msg = spi.new_msg('delta', delta.line())
msg:parse()
msg:encode()
msg:tx(spidev)
nixio.nanosleep(0, 10e7) --> 10ms
msg:rx(spidev)
msg:decode()
--> dbg.vardump(msg)
delta.fdout:write(msg.decoded.cmd .. ' ' .. table.concat(msg.decoded, ' ') .. '\n')
end
end
end